[PATCH 1/1] cmd: Handle lines with just spaces in bracket blocks.

[Bernhard Übelacker]

From: Bernhard Übelacker

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51599
Signed-off-by: Bernhard Übelacker 
---
 programs/cmd/tests/test_builtins.cmd     |  4 ++++
 programs/cmd/tests/test_builtins.cmd.exp |  1 +
 programs/cmd/wcmdmain.c                  | 18 +++++++++++++++++-
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/programs/cmd/tests/test_builtins.cmd b/programs/cmd/tests/test_builtins.cmd
index 3f410e55166..56ef2a5f726 100644
--- a/programs/cmd/tests/test_builtins.cmd
+++ b/programs/cmd/tests/test_builtins.cmd
@@ -1020,6 +1020,10 @@ if not exist %windir% (
 ) else (
   echo windir does exist
 )
+if 1 == 0 (
+   echo 1 == 0 should not be true
+   @space@@tab@
+) else echo block containing a line with just spaces seems to work
 echo --- case sensitivity with and without /i option
 if bar==BAR echo if does not default to case sensitivity
 if not bar==BAR echo if seems to default to case sensitivity
diff --git a/programs/cmd/tests/test_builtins.cmd.exp b/programs/cmd/tests/test_builtins.cmd.exp
index 8b6e0914112..7ce684ae6fa 100644
--- a/programs/cmd/tests/test_builtins.cmd.exp
+++ b/programs/cmd/tests/test_builtins.cmd.exp
@@ -701,6 +701,7 @@ comparison operators surrounded by brackets seem to work
 comparison operators surrounded by brackets seem to work
 windir is defined
 windir does exist
+block containing a line with just spaces seems to work
 --- case sensitivity with and without /i option
 if seems to default to case sensitivity
 if /i seems to work
diff --git a/programs/cmd/wcmdmain.c b/programs/cmd/wcmdmain.c
index af54b209d83..1b2f07fdc47 100644
--- a/programs/cmd/wcmdmain.c
+++ b/programs/cmd/wcmdmain.c
@@ -1798,6 +1798,22 @@ static BOOL WCMD_IsEndQuote(const WCHAR *quote, int quoteIndex)
     return FALSE;
 }

+/***************************************************************************
+ * WCMD_isEmptyOrJustWhiteSpace
+ *
+ *   Returns TRUE if str is empty or contains just whitespace characters,
+ *   otherwise returns FALSE.
+ */
+static BOOL WCMD_isEmptyOrJustWhiteSpace(const WCHAR *str)
+{
+    while (*str != '\0') {
+        if (*str != ' ' && *str != '\t')
+            return FALSE;
+        str++;
+    }
+    return TRUE;
+}
+
 /***************************************************************************
  * WCMD_ReadAndParseLine
  *
@@ -2319,7 +2335,7 @@ WCHAR *WCMD_ReadAndParseLine(const WCHAR *optionalcmd, CMD_LIST **output, HANDLE
             } else break;
           }

-        } while (*extraData == 0x00);
+        } while (WCMD_isEmptyOrJustWhiteSpace(extraData));
         curPos = extraSpace;

/* Skip preceding whitespace */